##### The exercice is validated is all questions of the exercice are validated

##### The question 1 is validated if the outputted plot looks like:

![alt text][ex5q1]

[ex5q1]: ../w2_day1_ex5_q1.png "Scatter plot "

##### The question 2 is validated if the output is: `11808.867339751561`

##### The question 3 is validated if `grid.shape` is `(640000,2)`.

##### The question 4 is validated if the 10 first values of losses are:

```console
array([158315.41493175, 158001.96852692, 157689.02212209, 157376.57571726,
    157064.62931244, 156753.18290761, 156442.23650278, 156131.79009795,
    155821.84369312, 155512.39728829])
```

##### The question 5 is validated if the outputted plot looks like

![alt text][ex5q5]

[ex5q5]: ../w2_day1_ex5_q5.png "MSE"

##### The question 6 is validated if the point returned is
`array([42.5, 99. ])`. It means that `a= 42.5` and `b=99`.

##### The question 7 is validated if the coefficients returned are

```console
Coefficients (a): 42.61943031121358
Intercept (b): 99.18581814447936
```

##### The question 8 is validated if the outputted plot is

![alt text][ex5q8]

[ex5q8]: ../w2_day1_ex5_q8.png "MSE + Gradient descent"

##### The question 9 is validated if the coefficients and intercept returned are:

```console
Coefficients:  [42.61943029]
Intercept:  99.18581817296929
```